383 lines
14 KiB
Python
383 lines
14 KiB
Python
import bleach
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from bs4 import BeautifulSoup
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from bleach.css_sanitizer import CSSSanitizer
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from bleach.linkifier import LinkifyFilter, build_url_re
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from functools import partial
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from .get import *
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from os import path, environ
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import re
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from mistletoe import markdown
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from json import loads, dump
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from random import random, choice
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import signal
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import time
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import requests
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TLDS = ( # Original gTLDs and ccTLDs
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'ac','ad','ae','aero','af','ag','ai','al','am','an','ao','aq','ar','arpa','as','asia','at',
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'au','aw','ax','az','ba','bb','bd','be','bf','bg','bh','bi','biz','bj','bm','bn','bo','br',
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'bs','bt','bv','bw','by','bz','ca','cafe','cat','cc','cd','cf','cg','ch','ci','ck','cl',
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'cm','cn','co','com','coop','cr','cu','cv','cx','cy','cz','de','dj','dk','dm','do','dz','ec',
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'edu','ee','eg','er','es','et','eu','fi','fj','fk','fm','fo','fr','ga','gb','gd','ge','gf',
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'gg','gh','gi','gl','gm','gn','gov','gp','gq','gr','gs','gt','gu','gw','gy','hk','hm','hn',
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'hr','ht','hu','id','ie','il','im','in','info','int','io','iq','ir','is','it','je','jm','jo',
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'jobs','jp','ke','kg','kh','ki','km','kn','kp','kr','kw','ky','kz','la','lb','lc','li','lk',
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'lr','ls','lt','lu','lv','ly','ma','mc','md','me','mg','mh','mil','mk','ml','mm','mn','mo',
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'mobi','mp','mq','mr','ms','mt','mu','museum','mv','mw','mx','my','mz','na','name',
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'nc','ne','net','nf','ng','ni','nl','no','np','nr','nu','nz','om','org','pa','pe','pf','pg',
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'ph','pk','pl','pm','pn','post','pr','pro','ps','pt','pw','py','qa','re','ro','rs','ru','rw',
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'sa','sb','sc','sd','se','sg','sh','si','sj','sk','sl','sm','sn','so','social','sr','ss','st',
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'su','sv','sx','sy','sz','tc','td','tel','tf','tg','th','tj','tk','tl','tm','tn','to','tp',
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'tr','travel','tt','tv','tw','tz','ua','ug','uk','us','uy','uz','va','vc','ve','vg','vi','vn',
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'vu','wf','ws','xn','xxx','ye','yt','yu','za','zm','zw',
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# New gTLDs
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'club','florist','fun','gay','lgbt','lol','moe','monster','win','wtf','xyz',
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)
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allowed_tags = ('b','blockquote','br','code','del','em','h1','h2','h3','h4','h5','h6','hr','i',
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'li','ol','p','pre','strong','sub','sup','table','tbody','th','thead','td','tr','ul',
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'marquee','a','span','ruby','rp','rt','spoiler','img','lite-youtube','video','source','audio')
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allowed_styles = ['color', 'background-color', 'font-weight', 'text-align',]
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def allowed_attributes(tag, name, value):
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if name == 'style': return True
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if tag == 'marquee':
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if name in ['direction', 'behavior', 'scrollamount']: return True
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if name in {'height', 'width'}:
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try: value = int(value.replace('px', ''))
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except: return False
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if 0 < value <= 250: return True
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return False
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if tag == 'a':
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if name == 'href': return True
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if name == 'rel' and value == 'nofollow noopener noreferrer': return True
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if name == 'target' and value == '_blank': return True
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return False
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if tag == 'img':
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if name in ['src','data-src']:
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if value.startswith('/') or value.startswith(f'{SITE_FULL}/') or embed_fullmatch_regex.fullmatch(value): return True
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else: return False
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if name == 'loading' and value == 'lazy': return True
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if name == 'data-bs-toggle' and value == 'tooltip': return True
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if name in ['g','b'] and not value: return True
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if name in ['alt','title']: return True
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if name == 'referrpolicy' and value == 'no-referrer': return True
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return False
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if tag == 'lite-youtube':
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if name == 'params' and value.startswith('autoplay=1&modestbranding=1'): return True
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if name == 'videoid': return True
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return False
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if tag == 'video':
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if name == 'controls' and value == '': return True
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if name == 'preload' and value == 'none': return True
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return False
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if tag == 'source':
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if name == 'src' and embed_fullmatch_regex.fullmatch(value): return True
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return False
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if tag == 'audio':
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if name == 'controls' and value == '': return True
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if name == 'preload' and value == 'none': return True
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if name == 'src' and embed_fullmatch_regex.fullmatch(value): return True
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return False
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if tag == 'p':
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if name == 'class' and value == 'mb-0': return True
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return False
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if tag == 'span':
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if name == 'data-bs-toggle' and value == 'tooltip': return True
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if name == 'title': return True
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if name == 'alt': return True
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return False
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url_re = build_url_re(tlds=TLDS, protocols=['http', 'https'])
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def callback(attrs, new=False):
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if (None, "href") not in attrs:
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return # Incorrect <a> tag
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href = attrs[(None, "href")]
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# \ in href right after / makes most browsers ditch site hostname and allows for a host injection bypassing the check, see <a href="/\google.com">cool</a>
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if "\\" in href:
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attrs["_text"] = href # Laugh at this user
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del attrs[(None, "href")] # Make unclickable and reset harmful payload
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return attrs
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if not href.startswith('/') and not href.startswith(f'{SITE_FULL}/'):
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attrs[(None, "target")] = "_blank"
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attrs[(None, "rel")] = "nofollow noopener noreferrer"
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return attrs
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def handler(signum, frame):
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print("Timeout!", flush=True)
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raise Exception("Timeout")
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def render_emoji(html, regexp, edit, marseys_used=set(), b=False):
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emojis = list(regexp.finditer(html))
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captured = set()
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for i in emojis:
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if i.group(0) in captured: continue
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captured.add(i.group(0))
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emoji = i.group(1).lower()
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attrs = ''
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if b: attrs += ' b'
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if not edit and len(emojis) <= 20 and random() < 0.0025 and ('marsey' in emoji or emoji in marseys_const2): attrs += ' g'
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old = emoji
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emoji = emoji.replace('!','').replace('#','')
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if emoji == 'marseyrandom': emoji = choice(marseys_const2)
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emoji_partial_pat = '<img loading="lazy" alt=":{0}:" src="{1}"{2}>'
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emoji_partial = '<img loading="lazy" data-bs-toggle="tooltip" alt=":{0}:" title=":{0}:" src="{1}"{2}>'
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emoji_html = None
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if emoji.endswith('pat'):
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if path.isfile(f"files/assets/images/emojis/{emoji.replace('pat','')}.webp"):
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emoji_html = f'<span data-bs-toggle="tooltip" alt=":{old}:" title=":{old}:"><img src="/assets/images/hand.webp">{emoji_partial_pat.format(old, f"/e/{emoji[:-3]}.webp", attrs)}</span>'
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elif emoji.startswith('@'):
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if u := get_user(emoji[1:-3], graceful=True):
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emoji_html = f'<span data-bs-toggle="tooltip" alt=":{old}:" title=":{old}:"><img src="/assets/images/hand.webp">{emoji_partial_pat.format(old, f"/pp/{u.id}", attrs)}</span>'
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elif path.isfile(f'files/assets/images/emojis/{emoji}.webp'):
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emoji_html = emoji_partial.format(old, f'/e/{emoji}.webp', attrs)
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if emoji_html:
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marseys_used.add(emoji)
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html = re.sub(f'(?<!"){i.group(0)}', emoji_html, html)
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return html
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def sanitize(sanitized, alert=False, comment=False, edit=False):
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signal.signal(signal.SIGALRM, handler)
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signal.alarm(1)
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if not sanitized.startswith('```') and not sanitized.startswith('<pre>'):
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sanitized = linefeeds_regex.sub(r'\1\n\n\2', sanitized)
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sanitized = image_regex.sub(r'\1\4', sanitized)
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sanitized = image_check_regex.sub(r'\1', sanitized)
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sanitized = link_fix_regex.sub(r'\2https://\3', sanitized)
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sanitized = markdown(sanitized)
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sanitized = strikethrough_regex.sub(r'<del>\1</del>', sanitized)
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sanitized = sanitized.replace('','').replace('','').replace("\ufeff", "").replace("𒐪","")
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if alert:
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captured = []
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for i in mention_regex2.finditer(sanitized):
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if i.group(0) in captured: continue
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captured.append(i.group(0))
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u = get_user(i.group(1), graceful=True)
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if u:
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sanitized = sanitized.replace(i.group(0), f'''<p><a href="/id/{u.id}"><img loading="lazy" src="/pp/{u.id}">@{u.username}</a>''')
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else:
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sanitized = reddit_regex.sub(r'\1<a href="https://old.reddit.com/\2" rel="nofollow noopener noreferrer">/\2</a>', sanitized)
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sanitized = sub_regex.sub(r'\1<a href="/\2">/\2</a>', sanitized)
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for i in mention_regex.finditer(sanitized):
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u = get_user(i.group(2), graceful=True)
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if u and (not (g.v and g.v.any_block_exists(u)) or g.v.admin_level > 1):
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sanitized = sanitized.replace(i.group(0), f'''{i.group(1)}<a href="/id/{u.id}"><img loading="lazy" src="/pp/{u.id}">@{u.username}</a>''', 1)
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sanitized = imgur_regex.sub(r'\1_d.webp?maxwidth=9999&fidelity=high', sanitized)
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soup = BeautifulSoup(sanitized, 'lxml')
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for tag in soup.find_all("img"):
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if tag.get("src") and not tag["src"].startswith('/pp/'):
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tag["loading"] = "lazy"
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tag["data-src"] = tag["src"]
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tag["src"] = "/assets/images/loading.webp"
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tag['alt'] = f'![]({tag["data-src"]})'
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tag['referrerpolicy'] = "no-referrer"
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for tag in soup.find_all("a"):
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if tag.get("href") and fishylinks_regex.fullmatch(str(tag.string)):
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tag.string = tag["href"]
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sanitized = str(soup)
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sanitized = spoiler_regex.sub(r'<spoiler>\1</spoiler>', sanitized)
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marseys_used = set()
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emojis = list(emoji_regex.finditer(sanitized))
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if len(emojis) > 20: edit = True
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captured = []
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for i in emojis:
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if i.group(0) in captured: continue
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captured.append(i.group(0))
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old = i.group(0)
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if 'marseylong1' in old or 'marseylong2' in old or 'marseyllama1' in old or 'marseyllama2' in old: new = old.lower().replace(">", " class='mb-0'>")
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else: new = old.lower()
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new = render_emoji(new, emoji_regex2, edit, marseys_used, True)
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sanitized = sanitized.replace(old, new)
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emojis = list(emoji_regex2.finditer(sanitized))
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if len(emojis) > 20: edit = True
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sanitized = render_emoji(sanitized, emoji_regex2, edit, marseys_used)
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for rd in ["://reddit.com", "://new.reddit.com", "://www.reddit.com", "://redd.it", "://libredd.it", "://teddit.net"]:
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sanitized = sanitized.replace(rd, "://old.reddit.com")
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sanitized = sanitized.replace("nitter.net", "twitter.com").replace("old.reddit.com/gallery", "reddit.com/gallery").replace("https://youtu.be/", "https://youtube.com/watch?v=").replace("https://music.youtube.com/watch?v=", "https://youtube.com/watch?v=").replace("https://streamable.com/", "https://streamable.com/e/").replace("https://youtube.com/shorts/", "https://youtube.com/watch?v=").replace("https://mobile.twitter", "https://twitter").replace("https://m.facebook", "https://facebook").replace("m.wikipedia.org", "wikipedia.org").replace("https://m.youtube", "https://youtube").replace("https://www.youtube", "https://youtube").replace("https://www.twitter", "https://twitter").replace("https://www.instagram", "https://instagram").replace("https://www.tiktok", "https://tiktok")
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sanitized = sanitized.replace('&','&')
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if "https://youtube.com/watch?v=" in sanitized: sanitized = sanitized.replace("?t=", "&t=")
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captured = []
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for i in youtube_regex.finditer(sanitized):
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if i.group(0) in captured: continue
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captured.append(i.group(0))
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params = parse_qs(urlparse(i.group(2)).query)
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t = params.get('t', params.get('start', [0]))[0]
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if isinstance(t, str): t = t.replace('s','')
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htmlsource = f'{i.group(1)}<lite-youtube videoid="{i.group(3)}" params="autoplay=1&modestbranding=1'
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if t: htmlsource += f'&start={t}'
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htmlsource += '"></lite-youtube>'
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sanitized = sanitized.replace(i.group(0), htmlsource)
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sanitized = video_sub_regex.sub(r'\1<video controls preload="none"><source src="\2"></video>', sanitized)
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sanitized = audio_sub_regex.sub(r'\1<audio controls preload="none" src="\2"></audio>', sanitized)
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if comment:
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for marsey in g.db.query(Marsey).filter(Marsey.name.in_(marseys_used)).all():
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marsey.count += 1
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g.db.add(marsey)
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if '#fortune' in sanitized:
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sanitized = sanitized.replace('#fortune', '')
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sanitized += '\n\n<p>' + choice(FORTUNE_REPLIES) + '</p>'
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if '#8ball' in sanitized:
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(b8txt, b8knd) = choice(EIGHTBALL_REPLIES)
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b8color = EIGHTBALL_COLORS[b8knd]
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sanitized = sanitized.replace('#8ball', '')
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sanitized += '\n\n<p><span style="font-weight: bold; color: %s;">The 8-Ball Says: %s</span></p>' % (b8color, b8txt)
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if '#factcheck' in sanitized:
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sanitized = sanitized.replace('#factcheck', '')
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sanitized += '\n\n<p>' + choice(FACTCHECK_REPLIES) + '</p>'
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sanitized = sanitized.replace('<p></p>', '')
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sanitized = utm_regex.sub('', sanitized)
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sanitized = utm_regex2.sub('', sanitized)
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sanitized = sanitized.replace('<html><body>','').replace('</body></html>','')
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css_sanitizer = CSSSanitizer(allowed_css_properties=allowed_styles)
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sanitized = bleach.Cleaner(tags=allowed_tags,
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attributes=allowed_attributes,
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protocols=['http', 'https'],
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css_sanitizer=css_sanitizer,
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filters=[partial(LinkifyFilter, skip_tags=["pre"],
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parse_email=False, callbacks=[callback], url_re=url_re)]
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).clean(sanitized)
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soup = BeautifulSoup(sanitized, 'lxml')
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links = soup.find_all("a")
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domain_list = set()
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for link in links:
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href = link.get("href")
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if not href: continue
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url = urlparse(href)
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domain = url.netloc
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url_path = url.path
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domain_list.add(domain+url_path)
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parts = domain.split(".")
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for i in range(len(parts)):
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new_domain = parts[i]
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for j in range(i + 1, len(parts)):
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new_domain += "." + parts[j]
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domain_list.add(new_domain)
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bans = g.db.query(BannedDomain.domain).filter(BannedDomain.domain.in_(list(domain_list))).all()
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if bans: abort(403, description=f"Remove the banned domains {bans} and try again!")
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signal.alarm(0)
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return sanitized
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def allowed_attributes_emojis(tag, name, value):
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if tag == 'img':
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if name == 'src' and value.startswith('/'): return True
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if name == 'loading' and value == 'lazy': return True
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if name == 'data-bs-toggle' and value == 'tooltip': return True
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if name == 'g' and not value: return True
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if name in ['alt','title']: return True
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if tag == 'span':
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if name == 'data-bs-toggle' and value == 'tooltip': return True
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if name == 'title': return True
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if name == 'alt': return True
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return False
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return False
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def filter_emojis_only(title, edit=False, graceful=False):
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signal.signal(signal.SIGALRM, handler)
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signal.alarm(1)
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title = title.replace('','').replace('','').replace("\ufeff", "").replace("𒐪","").replace("\n", "").replace("\r", "").replace("\t", "").replace("&", "&").replace('<','<').replace('>','>').replace('"', '"').replace("'", "'").strip()
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title = render_emoji(title, emoji_regex3, edit)
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title = strikethrough_regex.sub(r'<del>\1</del>', title)
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title = bleach.clean(title, tags=['img','del','span'], attributes=allowed_attributes_emojis, protocols=['http','https'])
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signal.alarm(0)
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if len(title) > 1500 and not graceful: abort(400)
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else: return title
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